assume cs:code ds:data

data segment
    db 'BaSiC'
    db 'inFORMAtiOn'
data ends

code segment
start: mov ax,data
       mov ds,ax

       mov bx,0
       mov cx,5
s:     mov al,[bx]
       and al,11011111b
       mov [bx],al
       inc bx
       loop s

       mov bx,5
       mov cx,11
s0:    mov al,[bx]
       or al,00100000b
       mov [bx],al
       inc bx
       loop s0

       mov ax,4c00h
       int 21h

code ends

end start